dt-bindings: gnss: add sirfstar binding

Add binding for SiRFstar-based GNSS receivers.

Note that while four compatible-strings are initially added representing
devices which differ in which I/O interfaces they support, they
otherwise essentially share the same feature set.

Pin and supply names vary slightly, as do some recommended timings.

Note that the wakeup gpio is not intended to be used as a wakeup source,
but rather to detect the current power state of the device (active or
hibernate).

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/gnss/sirfstar.txt b/Documentation/devicetree/bindings/gnss/sirfstar.txt
new file mode 100644 (file)
index 0000000..648d183
--- /dev/null
+++ b/Documentation/devicetree/bindings/gnss/sirfstar.txt
@@ -0,0 +1,45 @@
+SiRFstar-based GNSS Receiver DT binding
+
+SiRFstar chipsets are used in GNSS-receiver modules produced by several
+vendors and can use UART, SPI or I2C interfaces.
+
+Please see Documentation/devicetree/bindings/gnss/gnss.txt for generic
+properties.
+
+Required properties:
+
+- compatible   : Must be one of
+
+                       "fastrax,uc430"
+                       "linx,r4"
+                       "wi2wi,w2sg0008i"
+                       "wi2wi,w2sg0084i"
+
+- vcc-supply   : Main voltage regulator (pin name: 3V3_IN, VCC, VDD)
+
+Required properties (I2C):
+- reg          : I2C slave address
+
+Required properties (SPI):
+- reg          : SPI chip select address
+
+Optional properties:
+
+- sirf,onoff-gpios     : GPIO used to power on and off device (pin name: ON_OFF)
+- sirf,wakeup-gpios    : GPIO used to determine device power state
+                         (pin name: RFPWRUP, WAKEUP)
+- timepulse-gpios      : Time pulse GPIO (pin name: 1PPS, TM)
+
+Example:
+
+serial@1234 {
+       compatible = "ns16550a";
+
+       gnss {
+               compatible = "wi2wi,w2sg0084i";
+
+               vcc-supply = <&gnss_reg>;
+               sirf,onoff-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;
+               sirf,wakeup-gpios = <&gpio0 17 GPIO_ACTIVE_HIGH>;
+       };
+};

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index 4f61ca1..c1a15cc 100644 (file)
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -124,6 +124,7 @@ excito      Excito
 ezchip EZchip Semiconductor
 fairphone      Fairphone B.V.
 faraday        Faraday Technology Corporation
+fastrax        Fastrax Oy
 fcs    Fairchild Semiconductor
 firefly        Firefly
 focaltech      FocalTech Systems Co.,Ltd
@@ -203,6 +204,7 @@ licheepi    Lichee Pi
 linaro Linaro Limited
 linksys        Belkin International, Inc. (Linksys)
 linux  Linux-specific binding
+linx   Linx Technologies
 lltc   Linear Technology Corporation
 logicpd        Logic PD, Inc.
 lsi    LSI Corp. (LSI Logic)

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt.rej b/Documentation/devicetree/bindings/vendor-prefixes.txt.rej
new file mode 100644 (file)
index 0000000..a32acd9
--- /dev/null
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt.rej
@@ -0,0 +1,10 @@
+--- Documentation/devicetree/bindings/vendor-prefixes.txt
++++ Documentation/devicetree/bindings/vendor-prefixes.txt
+@@ -395,6 +397,7 @@ vot        Vision Optical Technology Co., Ltd.
+ wd    Western Digital Corp.
+ wetek WeTek Electronics, limited.
+ wexler        Wexler
++wi2wi Wi2Wi, Inc.
+ winbond Winbond Electronics corp.
+ winstar       Winstar Display Corp.
+ wlf   Wolfson Microelectronics